8478387 has 6 divisors (see below), whose sum is σ = 12246572. Its totient is φ = 5652252.

The previous prime is 8478383. The next prime is 8478391. The reversal of 8478387 is 7838748.

8478387 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8478383) and next prime (8478391).

It is not a de Polignac number, because 8478387 - 2² = 8478383 is a prime.

It is a super-2 number, since 2×8478387² = 143766092243538, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8478383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471013 + ... + 471030.

Almost surely, 2^8478387 is an apocalyptic number.

8478387 is a deficient number, since it is larger than the sum of its proper divisors (3768185).

8478387 is a wasteful number, since it uses less digits than its factorization.

8478387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942049 (or 942046 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 8478387 is about 2911.7669893039. The cubic root of 8478387 is about 203.9096341403.

The spelling of 8478387 in words is "eight million, four hundred seventy-eight thousand, three hundred eighty-seven".